This is my first go at a quality System. At some point I will update my amp to seperates but at this point I am totally happy. Amber seems to drive Mani's well except Rock & Roll at excessive volume's get's a bit muddy and clipping can occur. Only at more than 95% of amp output. I mostly listen to Blues and world so plenty of volume for that. The Amp upgrades in mind are Plinius SA 250 MK 4 or 300 , Sim audio W-5, Music Fidelity KW 500 . Haven't looked into Pre yet. Speakers are moved into marked spots on floor when listening. Speaker placement has been tricky as the room is open on one side and large sliding glass doors on the other.